Adhesive installation, includes spare screws. Seals gaps 5–12mm, weight 191g. 82cm long with 15mm black brush Unopened, perfect for door/window dust proofing. Also helps prevent cockroaches or small insects from entering. Free delivery if purchase is over 69 rmb (feel free to check out my home page for other posts) or pick up near Subway Line 8 Lingzhao Xincun